820734355 has 16 divisors (see below), whose sum is σ = 1184820480. Its totient is φ = 533168352.

The previous prime is 820734353. The next prime is 820734367. The reversal of 820734355 is 553437028.

It is a cyclic number.

It is not a de Polignac number, because 820734355 - 2¹ = 820734353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (820734353) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 616429 + ... + 617758.

It is an arithmetic number, because the mean of its divisors is an integer number (74051280).

Almost surely, 2^820734355 is an apocalyptic number.

820734355 is a deficient number, since it is larger than the sum of its proper divisors (364086125).

820734355 is a wasteful number, since it uses less digits than its factorization.

820734355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1234218.

The product of its (nonzero) digits is 100800, while the sum is 37.

The square root of 820734355 is about 28648.4616515442. The cubic root of 820734355 is about 936.2694891318.

The spelling of 820734355 in words is "eight hundred twenty million, seven hundred thirty-four thousand, three hundred fifty-five".